Vulnerability-Lookup

GHSA-MXFM-927R-8R7X

Vulnerability from github – Published: 2026-04-24 15:32 – Updated: 2026-04-24 15:32

Details

In the Linux kernel, the following vulnerability has been resolved:

PM: sleep: Drop spurious WARN_ON() from pm_restore_gfp_mask()

Commit 35e4a69b2003f ("PM: sleep: Allow pm_restrict_gfp_mask() stacking") introduced refcount-based GFP mask management that warns when pm_restore_gfp_mask() is called with saved_gfp_count == 0.

Some hibernation paths call pm_restore_gfp_mask() defensively where the GFP mask may or may not be restricted depending on the execution path. For example, the uswsusp interface invokes it in SNAPSHOT_CREATE_IMAGE, SNAPSHOT_UNFREEZE, and snapshot_release(). Before the stacking change this was a silent no-op; it now triggers a spurious WARNING.

Remove the WARN_ON() wrapper from the !saved_gfp_count check while retaining the check itself, so that defensive calls remain harmless without producing false warnings.

[ rjw: Subject tweak ]

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{
  "affected": [],
  "aliases": [
    "CVE-2026-31567"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-24T15:16:31Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nPM: sleep: Drop spurious WARN_ON() from pm_restore_gfp_mask()\n\nCommit 35e4a69b2003f (\"PM: sleep: Allow pm_restrict_gfp_mask()\nstacking\") introduced refcount-based GFP mask management that warns\nwhen pm_restore_gfp_mask() is called with saved_gfp_count == 0.\n\nSome hibernation paths call pm_restore_gfp_mask() defensively where\nthe GFP mask may or may not be restricted depending on the execution\npath. For example, the uswsusp interface invokes it in\nSNAPSHOT_CREATE_IMAGE, SNAPSHOT_UNFREEZE, and snapshot_release().\nBefore the stacking change this was a silent no-op; it now triggers\na spurious WARNING.\n\nRemove the WARN_ON() wrapper from the !saved_gfp_count check while\nretaining the check itself, so that defensive calls remain harmless\nwithout producing false warnings.\n\n[ rjw: Subject tweak ]",
  "id": "GHSA-mxfm-927r-8r7x",
  "modified": "2026-04-24T15:32:34Z",
  "published": "2026-04-24T15:32:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31567"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3025ca5daa9d682b629c0c958b538e41deeb559d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a8d51efb5929ae308895455a3e496b5eca2cd143"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f19d1323aa3dd7ead469aef47d9085f8939565d9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-31567 (GCVE-0-2026-31567)

Vulnerability from cvelistv5 – Published: 2026-04-24 14:35 – Updated: 2026-04-24 14:35

Title

PM: sleep: Drop spurious WARN_ON() from pm_restore_gfp_mask()

Summary

In the Linux kernel, the following vulnerability has been resolved: PM: sleep: Drop spurious WARN_ON() from pm_restore_gfp_mask() Commit 35e4a69b2003f ("PM: sleep: Allow pm_restrict_gfp_mask() stacking") introduced refcount-based GFP mask management that warns when pm_restore_gfp_mask() is called with saved_gfp_count == 0. Some hibernation paths call pm_restore_gfp_mask() defensively where the GFP mask may or may not be restricted depending on the execution path. For example, the uswsusp interface invokes it in SNAPSHOT_CREATE_IMAGE, SNAPSHOT_UNFREEZE, and snapshot_release(). Before the stacking change this was a silent no-op; it now triggers a spurious WARNING. Remove the WARN_ON() wrapper from the !saved_gfp_count check while retaining the check itself, so that defensive calls remain harmless without producing false warnings. [ rjw: Subject tweak ]

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/3025ca5daa9d682b6…
	https://git.kernel.org/stable/c/f19d1323aa3dd7ead…
	https://git.kernel.org/stable/c/a8d51efb5929ae308…

Impacted products

Vendor

Product

Version

Linux

Affected: 35e4a69b2003f20a69e7d19ae96ab1eef1aa8e8d , < 3025ca5daa9d682b629c0c958b538e41deeb559d (git)
Affected: 35e4a69b2003f20a69e7d19ae96ab1eef1aa8e8d , < f19d1323aa3dd7ead469aef47d9085f8939565d9 (git)
Affected: 35e4a69b2003f20a69e7d19ae96ab1eef1aa8e8d , < a8d51efb5929ae308895455a3e496b5eca2cd143 (git)
Affected: 4ddf7293928cb619077724b7d828734da8181e6c (git)

Linux

Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.21 , ≤ 6.18.* (semver)
Unaffected: 6.19.11 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/power/main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3025ca5daa9d682b629c0c958b538e41deeb559d",
              "status": "affected",
              "version": "35e4a69b2003f20a69e7d19ae96ab1eef1aa8e8d",
              "versionType": "git"
            },
            {
              "lessThan": "f19d1323aa3dd7ead469aef47d9085f8939565d9",
              "status": "affected",
              "version": "35e4a69b2003f20a69e7d19ae96ab1eef1aa8e8d",
              "versionType": "git"
            },
            {
              "lessThan": "a8d51efb5929ae308895455a3e496b5eca2cd143",
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              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4ddf7293928cb619077724b7d828734da8181e6c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/power/main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
              "lessThan": "6.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.21",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.21",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
                {
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPM: sleep: Drop spurious WARN_ON() from pm_restore_gfp_mask()\n\nCommit 35e4a69b2003f (\"PM: sleep: Allow pm_restrict_gfp_mask()\nstacking\") introduced refcount-based GFP mask management that warns\nwhen pm_restore_gfp_mask() is called with saved_gfp_count == 0.\n\nSome hibernation paths call pm_restore_gfp_mask() defensively where\nthe GFP mask may or may not be restricted depending on the execution\npath. For example, the uswsusp interface invokes it in\nSNAPSHOT_CREATE_IMAGE, SNAPSHOT_UNFREEZE, and snapshot_release().\nBefore the stacking change this was a silent no-op; it now triggers\na spurious WARNING.\n\nRemove the WARN_ON() wrapper from the !saved_gfp_count check while\nretaining the check itself, so that defensive calls remain harmless\nwithout producing false warnings.\n\n[ rjw: Subject tweak ]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-24T14:35:47.453Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/f19d1323aa3dd7ead469aef47d9085f8939565d9"
        },
        {
          "url": "https://git.kernel.org/stable/c/a8d51efb5929ae308895455a3e496b5eca2cd143"
        }
      ],
      "title": "PM: sleep: Drop spurious WARN_ON() from pm_restore_gfp_mask()",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31567",
    "datePublished": "2026-04-24T14:35:47.453Z",
    "dateReserved": "2026-03-09T15:48:24.117Z",
    "dateUpdated": "2026-04-24T14:35:47.453Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-MXFM-927R-8R7X

CVE-2026-31567 (GCVE-0-2026-31567)

Tags

Sightings

Nomenclature